Annealing-box.



.1. A. HELLSTROM.

ANNEALING Box. APPLICATION FILED FEB. 12' I918.

Patented Aug. 18.

2 S H E ETSS H E J. A. HELLSTROM.

ANNEALING BOX. APPLICATION FILED FEB.12| 191B.

Patented Aug. 6, 1918.

2 SHEETS-SHEET 2- 6, a a; a

mlll u m wmm M v 1 Q g u m PETERSQLFNOYO-LITHBHWASHINGTH ac JOHN A.'I+InLI.srIto1 /I, or WHEELING, wnsr VIRGINIA.

'ANNEALING-BOX.

Specification of Letters Patent.

Patented Aug. 6, 1918.

Application filed February 12, 1918. 7 Serial No. 216,820.

To all whom it mayconcern: Be it known that I, JOHN a subject of the Kingdom of Sweden, residarch roof.

ing at Wheeling, in the county of Ohio and State of West Virginia,.have invented certain new and useful Improvements in Allf nealing-Boxes, of which the following is a specification, reference being bad therein to the accompanying drawing.

This invention relates to improvements in annealing boxes and'its objectis. to so con-- struct the top sides and ends of the box thatexpansion and contraction thereof is so 1 taken care of that cracking, buckling and caving in of the box under the severe heat to whichit is subjected is prevented.

My improvement relates more particularly to what may be termed the fiat roof type of annealing box, but the improvement may be utilized in connection with an Referring now to the drawings in which Figure 1, is a side elevation showing an annealing box with my improved construction applied thereto. 7 r

Fig. 2, is an end elevation of Fig. 1.

' Fig. 3,'is a sideelevation of an annealing box showing my improvement thereto in modified form.

Fig. 4, is an end elevation of Fig. 3.

Referring now particularly to Figs. 1 and 2 in which like characters represent the same parts, 1 is an elongated annealing box having a roof 2, side 3, and end l. Formed in the roof are a plurality of inverted' grooves 5 which extend across the roof of the box and partially down its side as shown. At each side of these inverted grooves 5 are ribs 6 which extend across the roof of the box and also partially down on the side 3 of the box as shown at 7. Connecting these transverse ribs 6 are longitudinal ribs 8 and a central rib 9 extending longitudinal the roof from the end ribs 6, and partially down the ends of the box as shown in Fig. 2.

The object of the inverted grooves in the roof is to take care of the longitudinal expansion of the box, thereby preventing the roof from cracking due to contraction, because the circular parts formed by the grooves 5 will naturally bend in both contraction and expansion.

The inverted sections formed by these grooves 5 will also act as stiffeners for the roof. This construction will prevent the A. HELLsTRoM,

buckling or cracking of the roof which often happens in the. flat roof type ofannealing box. Y

The ribs 6, 7 and 8 of the top of the box are placed at intervals andprevent any portionof the roof from buckling between the inverted sections, and owing to the fact that these ribs extend down somewhat on the side Y of-the box, they prevent the sides spreading at the top, which isalso often the case in boxes of the fiat roof type.

.The sides of the boxare provided with a master oblong shape rib 10 and a second and smaller oblong shape rib 11 is located within the rib 10. Between the circular shape ends of-the ribs 10 and 'lla cur'ved rib 12 is lo-' cated and has it's ends merge into the top and bottom of the rib 12. Curved ribs 13 are located within and between the curved ends of the rib 11 and a central rib let. Connecting the curved ribs 10, 11, 1 2, 13, 'and thecentral rib 14: is acentrallyarranged rib 15 and the ends of this rib 15 extend beyond the ends of the oblong rib l0.

The ends of the box are provided with a large circular rib 16 and the small circular ribl7. Radiating from these ribs areribs 1s, 19, 20, 21, 22 and 23.

traction of the box and prevent its cracking or buckling. These ribs also serve to straighten the sides and ends of the box.

Referring now to Figs. 3 and 4: which is a slight modification of the form shownv in Figs. 1 and 2, the top of the box is provided with cylindrical shape portions 2 1 which extend across the roof of the box at intervals and have their tops open as at 25. This form of roof permits the box to expand longitudinally and crosswise and to corres 0ndingly contract without cracking or buc ling, and the cylindrical shape portions prevent the roof from caving in under the action of severe heat. Stifi'ening ribs 26 are located on the roof of the box between the cylindrical portions 24 as shown and also between the end of the cylindrical portions and the end of the box. These ribs serve as stiffeners for the roof to prevent it from caving in between the cylindrical portions.

It will be observed that these cylindrical. portions form transverse grooves in the roof of the box the same as in Fig. 1 with the Walls of the grooves extending around to approximately a cylinder with slotted or open tops 25. V

The end and sides of the box are provided with wavy ribs 27 connected by angular ribs 28. These ribs are merely to keep the side of the box from buckling due to heat, and the wavy ribs will prevent cracking due to contraction or expansion, since during the expansion or contraction up and down the sides of the box these ribs will have a tendency to straighten themselves and will be more eliicient under longitudinal expansion due to their being more flexible than straight ribs. The straight ribs on the top and bottom will move up and down and longitudinally with the wavy ribs.

From the foregoing description, it will be observed that the box roof is provided with a plurality of inverted arches, formed by the grooves 5 in Figs. 1 and 2, and by the cylindrical port-ions 24 of Figs. 3 and 4t, and that the top, sides and ends are provided with combined strengthening expansion and contraction ribs which prevent the box from cracking, buckling or caving in under the action of the severe heat to which it is subjected.

The specific construction of the box shown in Figs. 1 and 2 is not claimed herein, as that is the subject-matter of a divisional application.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. An annealing box formed as an integral structure, having its top provided with inverted arches, the wall of the arches extending upward and curved in forming approximately cylinders, for the purpose described.

2. An annealing box formed as an integral structure, having its top provided with inverted arches, its sides and ends provided with ribs connected with the wall of the arches, whereby expansion, contraction and strength are provided and cracking, buckling and caving in of the box prevented.

3. An annealing box formed as an integral structure, having its top provided with inverted arches, the walls of which are extended upward and inward to form approximately cylinders with open tops, for the purpose described.

a. An annealing box formed as an integral structure, the top of the box provided with a plurality of inverted transverse arches in cylindrical form, and the sides and ends of the box provided with vertically arranged wavy ribs, for the purpose described.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

JOHN A. HELLSTROM.

Witnesses:

JOHN S. RUSH, CHAS. H. MANION.

Copies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, D. G. 

